Turbocharger impeller structure for containment test
By introducing air passages and structural designs into the turbocharger impeller structure, the design of reduced air pressure and strength is used to make the impeller easily break within the specified speed range, solving the problems of low test success rate and high cost in the prior art. , achieving efficient inclusive experiments.
Patent Information
- Application Number
- CN202421328461.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-12
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2034-06-12
AI Technical Summary
In the inclusion test, the existing turbocharger impeller structure is difficult to rupture in a specified rotational speed range, resulting in low test success rate and high cost, especially when high-nickel alloy materials are used.
A turbocharger impeller structure is designed, including a connecting rod and an impeller. The impeller has a central shaft, multiple blades, turbine nose and air passage. The air passage passes through the air inlet section, transition section and air outlet section, and uses air pressure to make The impeller is prone to rupture when rotating at high speed, and reduces structural strength through the design of the central shaft and the turbine nose to facilitate rupture.
This improves the success rate of inclusive tests and reduces the cost of tests, ensuring that the impeller can break within the specified speed range, thereby improving the efficiency and economicality of the test.
Smart Images
Figure CN222296314U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of turbocharging, in particular to a turbocharger impeller structure used for containment testing. Background Art
[0002] In the automotive industry, as the requirements for energy conservation and emission reduction become increasingly stringent, engines equipped with turbochargers are becoming more and more popular, and the market has higher and higher requirements for the reliability and safety of turbochargers.
[0003] When a turbocharger is in operation, it is in an extremely high temperature and high-speed rotating working state. Once the turbocharger fails for some reason and the impeller is damaged, the impeller fragments will break through the casing and fly out of the engine, which may damage the engine and other parts of the vehicle at the very least, or even threaten the life safety of the driver and passengers. Therefore, all turbochargers must undergo containment tests during development to ensure that the turbocharger casing can completely contain the impeller fragments and prevent the impeller fragments from flying out of the casing.
[0004] However, the containment test conditions are relatively harsh, requiring the turbocharger impeller to rupture within a specified speed range. Premature rupture, late rupture, or no rupture are all considered test failures. Therefore, the success rate of the containment test is very low and the test cost is very high, especially when the turbine impeller is made of high-nickel alloy material, it is less likely to rupture. Therefore, how to improve the success rate of the containment test and reduce the test cost is a problem that technicians are committed to solving. Utility Model Content
[0005] The problem to be solved by the utility model is to provide a turbocharger impeller structure which is easy to break in a specified speed range in a containment test, so that the containment test success rate is high and the test cost is low.
[0006] The technical solution adopted by the utility model to solve the above problems is: a turbocharger impeller structure for containment testing, comprising:
[0007] a connecting rod, wherein the connecting rod is used to connect the power end; and
[0008] An impeller, wherein the impeller is arranged at one end of the connecting rod; the impeller includes a central axis, a plurality of blades arranged in a circumferential array on the outer wall of the central axis, a turbine nose arranged at one end of the central axis, and an air passage; the air passage includes a transition section arranged inside the central axis, at least one air inlet section arranged to pass from the outer wall of the central axis to the transition section, and an air outlet section arranged at the turbine nose and communicating with the transition section.
[0009] Compared with the prior art, the connecting rod of the utility model is used to connect the power end so as to drive the impeller to rotate; the impeller includes a central shaft and a plurality of blades. Driven by the connecting rod, the central shaft drives the blades to rotate within a specific speed range so as to test the containment performance of the turbocharger housing when the impeller is broken; the impeller also includes an air channel, and the air channel includes a transition section, an air inlet section and an air outlet section. When the impeller rotates at a high speed, air enters from the air inlet section, flows out from the air outlet section after passing through the transition section, thereby making the impeller easy to break with the help of air pressure; in addition, due to the setting of the air channel, the central shaft and the turbine nose become hollow, the structural strength is reduced, and it is easier to break, so that the impeller is easy to break within the specified speed range in the containment test, so that the success rate of the test is improved and the test cost is reduced.
[0010] The utility model discloses a turbocharger impeller structure for containment testing, wherein the central axis comprises a first shaft portion and a second shaft portion which are arranged to be connected to each other; the first shaft portion is arranged to have a uniform diameter; the second shaft portion is arranged to have a diameter gradually increasing from one end connected to the first shaft portion to the other end; the second shaft portion comprises a first base surface arranged at one end away from the first shaft portion.
[0011] The utility model provides a turbocharger impeller structure for containment testing, wherein the air inlet section is arranged on the second shaft portion.
[0012] The utility model provides a turbocharger impeller structure for containment testing, wherein the air inlet section is arranged to obliquely penetrate from the first base surface to the transition section.
[0013] The utility model provides a turbocharger impeller structure for containment testing, wherein the air inlet sections are arranged to be distributed circumferentially along the second shaft portion, and the number of the air inlet sections is 3-5.
[0014] The utility model provides a turbocharger impeller structure for containment testing, wherein the angle between the axis of the air inlet section and the axis of the second shaft portion is set to 30°-45°.
[0015] The utility model provides a turbocharger impeller structure for containment testing, wherein the bottom surface of the transition section is flush with the first base surface.
[0016] The utility model provides a turbocharger impeller structure for containment testing, wherein the blades 22 are arranged to extend from the first shaft portion to the first base surface of the second shaft portion.
[0017] The utility model provides a turbocharger impeller structure for containment testing, wherein the turbine nose is arranged at an end of the first shaft portion away from the second shaft portion, and the thickness of the turbine nose is smaller than the thickness of the first shaft portion.
[0018] The utility model provides a turbocharger impeller structure for containment testing, wherein the connecting rod comprises a connecting section and a transmission section; the connecting section is arranged to be connected to the first base surface 1. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a three-dimensional schematic diagram of the utility model from a side perspective;
[0020] Figure 2 It is a three-dimensional schematic diagram of the utility model from another side perspective;
[0021] Figure 3 It is a main schematic diagram of the utility model;
[0022] Figure 4 It is a cross-sectional schematic diagram of the utility model at one depth;
[0023] Figure 5 It is a cross-sectional schematic diagram at another depth of the utility model;
[0024] Figure 6 Schematic diagram of air flow direction of the air channel. DETAILED DESCRIPTION
[0025] Before describing in detail any embodiment of the utility model, it should be understood that the utility model is not limited in its application to the construction and arrangement details of the components described below or illustrated in the following figures. The utility model can have other embodiments and can be practiced or carried out in various ways. In addition, it should be understood that the words and terms used here are for descriptive purposes and should not be considered restrictive. The use of "including" or "having" and its variations herein is intended to cover the items and their equivalents and additional items displayed below. Unless otherwise specified or limited, the terms "install", "connect", "support" and "couple" and their variations are widely used and cover direct installation and indirect installation, connection, support and connection. In addition, "connect" and "couple" are not limited to physical or mechanical connections or connections.
[0026] Furthermore, on the first aspect, in the disclosure of the present invention, the terms "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore the above terms cannot be understood as limitations on the present invention; on the second aspect, the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" cannot be understood as a limitation on the quantity.
[0027] It should be understood by those skilled in the art that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been demonstrated and explained in the embodiments, and the embodiments of the present invention may be deformed or modified in any way without departing from the principles.
[0028] The embodiments of the present utility model are further described below in conjunction with the accompanying drawings.
[0029] See also Figure 1-6 A turbocharger impeller structure for containment testing is shown, comprising a connecting rod 1 and an impeller 2; wherein the connecting rod 1 is used to connect the power end; wherein the impeller 2 is arranged at one end of the connecting rod 1; the impeller 2 comprises a central axis 21, a plurality of blades 22 arranged in a circular array on the outer wall of the central axis 21, a turbine nose 23 arranged at one end of the central axis 21, and an air passage 24; the air passage 24 comprises a transition section 241 arranged inside the central axis 21, at least one air inlet section 242 arranged to pass from the outer wall of the central axis 21 to the transition section 241, and an air outlet section 243 arranged on the turbine nose 23 and communicating with the transition section 241.
[0030] In actual use, the connecting rod 1 of the utility model is used to connect the power end so as to drive the impeller 2 to rotate so that the rotation speed of the impeller 2 reaches a speed range suitable for the containment test; the impeller 2 includes a central axis 21 and a plurality of blades 22. Driven by the connecting rod 1, the central axis 21 drives the blades 22 to rotate within a specific speed range so as to test the containment performance of the turbocharger housing when the impeller 2 is broken; the impeller 2 also includes an air channel 24, and the air channel 24 includes a transition section 241, an air inlet section 242 and an air outlet section 243. When the impeller 2 rotates at a high speed, air enters from the air inlet section 242, flows out from the air outlet section 243 after passing through the transition section 241, thereby making the impeller 2 easy to break with the help of air pressure; in addition, due to the setting of the air channel 24, the central axis 21 and the turbine nose 23 become hollow, the structural strength is reduced, and it is easier to break, so that the impeller 2 is easy to break within the specified speed range in the containment test, so that the success rate of the test is improved and the test cost is reduced.
[0031] Please continue reading Figure 4 , wherein the central axis 21 includes a first axis portion 211 and a second axis portion 212 which are arranged to be connected to each other; the first axis portion 211 is arranged to have a uniform diameter; the second axis portion 212 is arranged to have a diameter gradually increasing from one end connected to the first axis portion 211 to the other end; the second axis portion 212 includes a first base surface 2121 arranged at an end away from the first axis portion 211.
[0032] Under this arrangement, the central shaft 21 has basic structural strength to prevent the impeller 2 from breaking prematurely before reaching the required rotation speed, thereby causing test failure.
[0033] Please continue reading Figure 2 , 4 , 5, wherein the air inlet section 242 is disposed on the second shaft portion 212.
[0034] Specifically, the second shaft portion 212 is configured to gradually increase in diameter from one end connected to the first shaft portion 211 to the other end. This structure provides space for the air inlet section 242 to be set up, so that when the impeller 2 rotates at high speed, air can enter the transition section 241 from the air inlet section 242.
[0035] Please continue reading Figure 5 , 6 , wherein the air inlet section 242 is arranged to obliquely penetrate from the first base surface 2121 to the transition section 241 .
[0036] During high-speed rotation of the impeller 2 , air flows from the connecting rod 1 to the impeller 2 . When the air inlet section 242 is arranged to obliquely penetrate from the first base surface 2121 to the transition section 241 , it is beneficial to coordinate the air flow direction so that more air can enter the air inlet section 242 .
[0037] Please continue reading Figure 2 , Figure 5 , wherein the air inlet sections 242 are arranged to be distributed circumferentially along the second shaft portion 212, and the number thereof is 3-5.
[0038] During the actual containment test, a smaller number of air inlet segments 242 may be used for the test first, for example, three air inlet segments 242 may be used. If no breakage occurs when the impeller 2 reaches a suitable speed range, the utility model may be used to increase the number of air inlet segments 242 for adjustment, so that by increasing the number of air inlet segments 242, the impeller 2 may be broken when it reaches a suitable speed range, thereby greatly reducing the number of tests.
[0039] It is worth mentioning that in addition to increasing the number of air inlet sections 242, the experimenter can also increase the size of the air inlet section 242. When the size of the air inlet section 242 is increased, more air can flow in and the structural strength of the second shaft portion 212 can be reduced, so that the impeller 2 breaks when it reaches a suitable speed range.
[0040] Please continue reading Figure 5 , Figure 6 , wherein the angle between the axis of the air inlet section 242 and the axis of the second shaft portion 212 is set to 30°-45°; under this angle setting, it is beneficial to cooperate with the air flow direction of the impeller 2 at high speed, so that air enters the air inlet section 242 and generates a force from the inside of the impeller 2, making the impeller 2 easy to break.
[0041] Please continue reading Figure 2 , 3 5, wherein the bottom surface of the transition section 241 is flush with the first base surface 2121. Under this arrangement, the solid portion between the transition section 241 and the second shaft portion 212 is reduced, which is beneficial to reducing the structural strength of the impeller 2 and making the impeller 2 easier to break.
[0042] Please continue reading Figure 1 , 2 , wherein the blade 22 is configured to extend from the first shaft portion 211 to the first base surface 2121 of the second shaft portion 212 so as to match the structural design of the first shaft portion 211 and the second shaft portion 212 .
[0043] Please continue reading Figure 1 , Figure 5 , Figure 6 The turbine nose 23 is disposed at an end of the first shaft portion 211 away from the second shaft portion 212 , and the thickness of the turbine nose 23 is smaller than the thickness of the first shaft portion 211 .
[0044] Specifically, since the blade 22 is configured to extend from the first shaft portion 211 to the first base surface 2121 of the second shaft portion 212, the first shaft portion 211 needs to have a certain thickness to support the high-speed rotation of the blade 22, and the turbine nose 23 is used to maintain balance and air circulation, so the thickness of the turbine nose 23 can be smaller than the thickness of the first shaft portion 211. This arrangement not only makes the turbine nose 23 more likely to break, but also saves materials, thereby further reducing the test cost.
[0045] Please continue reading Figure 1 , 2 , wherein the connecting rod 1 includes a connecting section 11 and a transmission section 12 ; the connecting section 11 is configured to be connected to the first base surface 2121 .
[0046] The above description is only for the best embodiment of the utility model, but it cannot be understood as a limitation of the claims. The utility model is not limited to the above embodiments, and its specific structure is allowed to be changed. All changes made within the protection scope of the independent claims of the utility model are within the protection scope of the utility model.
Claims
1. A turbocharger impeller structure for containment testing, characterized in that: include: A connecting rod (1), wherein the connecting rod (1) is used to connect the power end; as well as An impeller (2), wherein the impeller (2) is arranged at one end of the connecting rod (1); the impeller (2) comprises a central axis (21), a plurality of blades (22) arranged in a circumferential array on the outer wall of the central axis (21), a turbine nose (23) arranged at one end of the central axis (21), and an air passage (24); the air passage (24) comprises a transition section (241) arranged inside the central axis (21), at least one air inlet section (242) arranged to pass from the outer wall of the central axis (21) to the transition section (241), and an air outlet section (243) arranged at the turbine nose (23) and communicating with the transition section (241).
2. The turbocharger impeller structure for containment testing according to claim 1, characterized in that: The central axis (21) comprises a first axis portion (211) and a second axis portion (212) which are arranged to be connected to each other; the first axis portion (211) is arranged to have a uniform diameter; the second axis portion (212) is arranged to have a diameter that gradually increases from one end connected to the first axis portion (211) to the other end; the second axis portion (212) comprises a first base surface (2121) arranged at an end away from the first axis portion (211).
3. The turbocharger impeller structure for containment testing according to claim 2, characterized in that: The air inlet section (242) is arranged on the second shaft portion (212).
4. The turbocharger impeller structure for containment testing according to claim 3, characterized in that: The air inlet section (242) is arranged to obliquely penetrate from the first base surface (2121) to the transition section (241).
5. The turbocharger impeller structure for containment testing according to claim 3 or 4, characterized in that: The air inlet sections (242) are arranged to be distributed circumferentially along the second shaft portion (212), and the number of the air inlet sections (242) is 3-5.
6. The turbocharger impeller structure for containment testing according to claim 4, characterized in that: The included angle between the axis of the air inlet section (242) and the axis of the second shaft portion (212) is set to 30°-45°.
7. The turbocharger impeller structure for containment testing according to claim 2, characterized in that: The bottom surface of the transition section (241) is flush with the first base surface (2121).
8. The turbocharger impeller structure for containment testing according to claim 4, characterized in that: The blade (22) is arranged to extend from the first shaft portion (211) to a first base surface (2121) of the second shaft portion (212).
9. The turbocharger impeller structure for containment testing according to claim 4, characterized in that: The turbine nose (23) is arranged at an end of the first shaft portion (211) away from the second shaft portion (212), and the thickness of the turbine nose (23) is smaller than the thickness of the first shaft portion (211).
10. The turbocharger impeller structure for containment testing according to claim 2, characterized in that: The connecting rod (1) comprises a connecting section (11) and a transmission section (12); the connecting section (11) is arranged to be connected to the first base surface (2121).